window.path.change.js

(function () {
  var CHECK_INTERVAL = 100;

  var CURRENT_PATH = window.location.pathname;
  var PREVIOUS_PATH = "";

  function checkPath () {
    if (CURRENT_PATH !== window.location.pathname) {
      PREVIOUS_PATH = CURRENT_PATH;
      CURRENT_PATH = window.location.pathname;

      $(window.location).trigger("change", {
        currentPath: CURRENT_PATH,
        previousPath: PREVIOUS_PATH
      });
    }
  }
  // poll for location changes
  setInterval(checkPath, CHECK_INTERVAL);
})();